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Storing Magazines, Full or Empty?

Old 11-30-2020, 02:11 PM
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Default Storing Magazines, Full or Empty?

I wanted to see what the people on THT thought about this. I know it isn't much of an issue with handguns because, at least on my sigs, the magazine springs are stiffer than hell. What about pmags? Any advice as far as do or do not? Horror stories? Can anything else go wrong besides a weakened spring?
Old 11-30-2020, 02:17 PM
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Advice - Don't wait for something bad to happen to load mags. Empty mags are useless.

Download your PMags 1 round
Old 11-30-2020, 02:18 PM
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Loaded. It's not the full cap that weakens them... it's going from full to empty over and over again.
Old 11-30-2020, 02:19 PM
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i store loaded minus 1 round, rotate out every other month, wipe them down with a dash of Hobbs, doing this for years, never lost any spring tension..'sept for those cheap 40 round clips made in vietnam
Old 11-30-2020, 02:20 PM
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Originally Posted by TorFed View Post
I wanted to see what the people on THT thought about this. I know it isn't much of an issue with handguns because, at least on my sigs, the magazine springs are stiffer than hell. What about pmags? Any advice as far as do or do not? Horror stories? Can anything else go wrong besides a weakened spring?
Full with what ???
Old 11-30-2020, 02:41 PM
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8 rounds ready to go, 2 mags.
Old 11-30-2020, 02:43 PM
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The United States Army CCDC Armaments Center at Picatinny Arsenal, NJ set out to find the answer. In their testing in August 2017 “Performace of 5.56mm 30 Round Magazines After Extended Loaded Storage” 300 magazines were fully loaded, and for the next 5 years, 30 magazines were fired for performance and data collection every 6 months.

Spring pressure was measured when the test began, and again at the time, the magazines were pulled from storage.

Stoppages were counted during the testing.

According to the report no magazine-related stoppage was recorded.






Old 11-30-2020, 02:59 PM
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Spring steel metallurgy is formulated specifically to have a high yield strength. The coil spacing is calculated such that the movement will not reach the proportional limit(Hooks Law) of the steel. This insures the steel never enters the plastic region of the stress/strain curve. Therefore as long as the fatigue cycles are relatively low you should never see an appreciable diminishment in the spring force regardless if the spring is fully loaded(compressed) or unloaded.
Old 11-30-2020, 03:03 PM
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I store my AR's loaded with 20 rounds. I too have wondered but have never noticed any problems with jams after long term storage.
Old 11-30-2020, 03:06 PM
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I store my 10 round mags (NJ) with 9 rounds. No issues.
Old 11-30-2020, 03:21 PM
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Always full
Old 11-30-2020, 03:25 PM
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Originally Posted by PolishFly_Maine View Post
The United States Army CCDC Armaments Center at Picatinny Arsenal, NJ set out to find the answer. In their testing in August 2017 “Performace of 5.56mm 30 Round Magazines After Extended Loaded Storage” 300 magazines were fully loaded, and for the next 5 years, 30 magazines were fired for performance and data collection every 6 months.

Spring pressure was measured when the test began, and again at the time, the magazines were pulled from storage.

Stoppages were counted during the testing.

According to the report no magazine-related stoppage was recorded.
Thanks! Awesome info. I always load a few short of full, and use the P-mag clips to keep the feed lips from spreading.
Old 11-30-2020, 07:25 PM
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Originally Posted by Elusive View Post
Empty mags are useless.
X2
Old 11-30-2020, 07:36 PM
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.

Last edited by Al Czervik; 12-01-2020 at 03:53 AM.
Old 11-30-2020, 07:43 PM
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What’s long term storage? My clips get cycled frequently. At least they did until they went overboard...
Old 11-30-2020, 07:57 PM
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Originally Posted by BillTex View Post
What’s long term storage? My clips get cycled frequently. At least they did until they went overboard...
Lol that depends on how expensive and elusive ammo is. Realistically not more than a year.
Old 11-30-2020, 08:05 PM
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The first 10 or so loaded, after that too much its effort.
Old 11-30-2020, 08:18 PM
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Originally Posted by PolishFly_Maine View Post
The United States Army CCDC Armaments Center at Picatinny Arsenal, NJ set out to find the answer. In their testing in August 2017 “Performace of 5.56mm 30 Round Magazines After Extended Loaded Storage” 300 magazines were fully loaded, and for the next 5 years, 30 magazines were fired for performance and data collection every 6 months.

Spring pressure was measured when the test began, and again at the time, the magazines were pulled from storage.

Stoppages were counted during the testing.

According to the report no magazine-related stoppage was recorded.
Yeah, it was a concern when I was in Iraq. I carried twelve fully loaded 30-round magazines for my M-4 and four 15-round magazines for my M-9. I unloaded all to clean about every three months or if I had been in an environmental event like a sandstorm.

For the most part all magazines stayed loaded.
Old 11-30-2020, 08:20 PM
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Spares are full and the ones in the gun are full +1.
Old 11-30-2020, 10:27 PM
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What about 50 round .308 drums I had to buy one to play with...

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